Temporal bright light at low frequency retards lens-induced myopia in guinea pigs
Purpose Bright light conditions are supposed to curb eye growth in animals with experimental myopia. Here we investigated the effects of temporal bright light at very low frequencies exposures on lens-induced myopia (LIM) progression. Methods Myopia was induced by application of −6.00 D lenses over...
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PeerJ Inc.
2023-11-01
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| Online Access: | https://peerj.com/articles/16425.pdf |
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| author | Baodi Deng Wentao Li Ziping Chen Junwen Zeng Feng Zhao |
| author_facet | Baodi Deng Wentao Li Ziping Chen Junwen Zeng Feng Zhao |
| author_sort | Baodi Deng |
| collection | DOAJ |
| description | Purpose Bright light conditions are supposed to curb eye growth in animals with experimental myopia. Here we investigated the effects of temporal bright light at very low frequencies exposures on lens-induced myopia (LIM) progression. Methods Myopia was induced by application of −6.00 D lenses over the right eye of guinea pigs. They were randomly divided into four groups based on exposure to different lighting conditions: constant low illumination (CLI; 300 lux), constant high illumination (CHI; 8,000 lux), very low frequency light (vLFL; 300/8,000 lux, 10 min/c), and low frequency light (LFL; 300/8,000 lux, 20 s/c). Refraction and ocular dimensions were measured per week. Changes in ocular dimensions and refractions were analyzed by paired t-tests, and differences among the groups were analyzed by one-way ANOVA. Results Significant myopic shifts in refractive error were induced in lens-treated eyes compared with contralateral eyes in all groups after 3 weeks (all P < 0.05). Both CHI and LFL conditions exhibited a significantly less refractive shift of LIM eyes than CLI and vLFL conditions (P < 0.05). However, only LFL conditions showed significantly less overall myopic shift and axial elongation than CLI and vLFL conditions (both P < 0.05). The decrease in refractive error of both eyes correlated significantly with axial elongation in all groups (P < 0.001), except contralateral eyes in the CHI group (P = 0.231). LFL condition significantly slacked lens thickening in the contralateral eyes. Conclusions Temporal bright light at low temporal frequency (0.05 Hz) appears to effectively inhibit LIM progression. Further research is needed to determine the safety and the potential mechanism of temporal bright light in myopic progression. |
| first_indexed | 2024-03-11T10:06:14Z |
| format | Article |
| id | doaj.art-c13e2afa37ce4f24a27974934d9365c9 |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-11T10:06:14Z |
| publishDate | 2023-11-01 |
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| spelling | doaj.art-c13e2afa37ce4f24a27974934d9365c92023-11-16T15:05:22ZengPeerJ Inc.PeerJ2167-83592023-11-0111e1642510.7717/peerj.16425Temporal bright light at low frequency retards lens-induced myopia in guinea pigsBaodi Deng0Wentao Li1Ziping Chen2Junwen Zeng3Feng Zhao4State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, ChinaHuizhou Third People’s Hospital, Guangzhou Medical University, Huizhou, ChinaGuangdong Light Visual Health Research Institute, Guangzhou, ChinaState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, ChinaState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, ChinaPurpose Bright light conditions are supposed to curb eye growth in animals with experimental myopia. Here we investigated the effects of temporal bright light at very low frequencies exposures on lens-induced myopia (LIM) progression. Methods Myopia was induced by application of −6.00 D lenses over the right eye of guinea pigs. They were randomly divided into four groups based on exposure to different lighting conditions: constant low illumination (CLI; 300 lux), constant high illumination (CHI; 8,000 lux), very low frequency light (vLFL; 300/8,000 lux, 10 min/c), and low frequency light (LFL; 300/8,000 lux, 20 s/c). Refraction and ocular dimensions were measured per week. Changes in ocular dimensions and refractions were analyzed by paired t-tests, and differences among the groups were analyzed by one-way ANOVA. Results Significant myopic shifts in refractive error were induced in lens-treated eyes compared with contralateral eyes in all groups after 3 weeks (all P < 0.05). Both CHI and LFL conditions exhibited a significantly less refractive shift of LIM eyes than CLI and vLFL conditions (P < 0.05). However, only LFL conditions showed significantly less overall myopic shift and axial elongation than CLI and vLFL conditions (both P < 0.05). The decrease in refractive error of both eyes correlated significantly with axial elongation in all groups (P < 0.001), except contralateral eyes in the CHI group (P = 0.231). LFL condition significantly slacked lens thickening in the contralateral eyes. Conclusions Temporal bright light at low temporal frequency (0.05 Hz) appears to effectively inhibit LIM progression. Further research is needed to determine the safety and the potential mechanism of temporal bright light in myopic progression.https://peerj.com/articles/16425.pdfLens-induced myopiaDynamic lightTemporal illumination modulationGuinea pigs |
| spellingShingle | Baodi Deng Wentao Li Ziping Chen Junwen Zeng Feng Zhao Temporal bright light at low frequency retards lens-induced myopia in guinea pigs PeerJ Lens-induced myopia Dynamic light Temporal illumination modulation Guinea pigs |
| title | Temporal bright light at low frequency retards lens-induced myopia in guinea pigs |
| title_full | Temporal bright light at low frequency retards lens-induced myopia in guinea pigs |
| title_fullStr | Temporal bright light at low frequency retards lens-induced myopia in guinea pigs |
| title_full_unstemmed | Temporal bright light at low frequency retards lens-induced myopia in guinea pigs |
| title_short | Temporal bright light at low frequency retards lens-induced myopia in guinea pigs |
| title_sort | temporal bright light at low frequency retards lens induced myopia in guinea pigs |
| topic | Lens-induced myopia Dynamic light Temporal illumination modulation Guinea pigs |
| url | https://peerj.com/articles/16425.pdf |
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